You can access, append, insert, remove an item by using
itemAt, add, insertAt, remove, and removeAt.
To get the number of the items in the list, use getCount.
CList can also be used like a regular array as follows,

$list[]=$item; // append at the end
$list[$index]=$item; // $index must be between 0 and $list->Count
unset($list[$index]); // remove the item at $index
if(isset($list[$index])) // if the list has an item at $index
foreach($list as $index=>$item) // traverse each item in the list
$n=count($list); // returns the number of items in the list